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NRG User Manual | © 2020 | CARLO GAVAZZI LTD.
V1.0 | NRG EtherNet/IP User Manual | © 2020 | CARLO GAVAZZI LTD.
EN
Figure 1: NRG bus chain
2.
Description
2.1
System overview
The NRG is a sub-system that consists of one or more BUS chains that interact with the main controller or PLC in the
machine through an Ethernet/IP communication interface. The communication link in the NRG systems can either
be used to control the solid state relay, monitor various parameters and diagnose faults in real time.
An NRG BUS chain is made up of a minimum 1x NRG controller and a minimum of 1x NRG solid state relay (also
referred to as end-device). The NRG bus chain can have a maximum of 32 end devices. The communication link
between the NRG controller and the end-devices is the Internal BUS.
When more solid state relays are needed in a system, multiple BUS chains can be utilised. Each BUS chain connects
to another BUS chain in a line topology via the NRG controllers of the respective BUS chains or in a star topology via
an ethernet switch.
2.2
System components
The following system components are required for an NRG bus chain:
Description
Part number
Notes
NRG controller
NRGC..
NRGC
NRG Controller with Modbus RTU.
NRGC-PN
NRG controller with PROFINET.
NRGC-EIP
NRG controller with EtherNet/IP.
1x RGN-TERMRES is included in the NRGC..
packaging. The RGN-TERMRES is to be
mounted on the last RG..N on the bus
chain.
NRG solid state relays
RG..CM..N
RGx1A..CM..N
NRG zero cross switching solid state relay
NRG Internal bus cables
RGCR-GN-xx
Proprietary cables terminated at both
ends with micro USB connector
NRG controller
The NRG controller handles the communication with the higher-level controller and with the NRG solid
state relays. It has to be supplied with a 24VDC supply and provides the power supply to the
connected NRG solid state relays via the internal bus cables. A termination resistor (RGN-TERMRES)
provided with every NRG controller has to be fitted on the last solid state relay of the NRG bus chain.
The NRG controller is also capable of performing internal operations to setup and maintain the
internal bus
Various NRG Controller variants are available which facilitate communication via different
communication protocols. These are identified via the part numbers. The NRG controller with an
EtherNet/IP communication interface is the
NRGC-EIP
.
NRGC-EIP
